Grease gun charger



June 22, 1948. F. F. FUNK ETA'. 2,443,981

GREASE GUN CHARGER Filed March 19, 1945 Patented June 22,A 1948 UNITEDSTATES PATENT FFICEY Y 2,443,981/ GR-SGUN CliiintGER` Frank F. FunkandRobert D. Funk; Ottawa, Ill. Aspiration Marcha, 194s; sesame. 583,414

(o1.` assume) 3 Claims'. l`

,The presentlinve'ntion relates toa grease guii filler `or charger.

To iill grease guns it has been the custom to remove the rear end cap ofthe gun barrel `and also the piston, and to then feed inthe grease intothe barrel after which the piston was introduced and the cap screwed onthe end of the barrel. That was a rather messy job, much of the-greasewas lost, air would be entrapped into the grease in the barrel and dirtwould also become mixedwith the grease. y l

Among the objects of the presen-t invention is to .produce a noveldevice that avoids such disl` advantages and wherein the grease is feddirectly into the forward end of the gun in front of the piston withoutany loss of grease and without any entry of air and' dirt'.

Another object-oi the invention is to provide a novel means for use witha commercial grease container and which has a diaphragmatic piston foracting under atmospheric; pressure* and throughout the extent of thegrease mass in the container for eicent feed of the grease to the devicefor charging the grease gun, and being in sealing relation with thecontain-er to prevent loss of the grease and to prevent access' of `airand dirt into theA grease.

Other objects, advantages, capabilities, features and the likey arelcomprehended by the invention asv wiil later appear and as areinherentlypossessed by" the invention.

Referring to the drawings: y

Fig. 1 is a view partly in elevation and partly in section of anembodiment of the invention;

Fig. 2 is a longitudinal sectional view of the device; and

Fig. 3 is a transverse fragmentary sectional view taken in a planerepresented by line 3--3 in Fig. 2 of the drawings.

Referring more in detail to the drawings, the embodiment chosen toillustrate the invention is shown as comprising an outer hollow cylinderI in which telescopes and reciprocates an inner hollow cylinder 2 havinga free open lower end 3 and a reducing coupling 4 at its upper end. Tothe lower end of the cylinder l is xed a diaphragm 5 by way of a iiangedcollar 6 suitably secured t the lower end of the cylinder I and to thecentral portion 'I of the diaphragm 5, as shown. The perimetral portionof the diaphragm has a shoulder or fillet 8 for holding an annularpacking 9.

The lower end of the cylinder I has an end wall IIJ abutting with thecentral portion 'I of the diaphragm 5, and both these parts 1 and I0have avalve port or seat I I for the seating' there; on of a valve I2normally under the stress of a spring I3 field compressedebetwee'n theValve I2 anda spider i4 suitably' secured within theminder I` space'dlyabove the' valve I2, as shown' in Fig. 2. On the-lower end portion ofthecylinder 2 is carried a sealing ring I5. Within' the upper end portionof' the' cylinder 2' is iiiied awall or disc I6 having a valve port o'rse'at I7 for the seating thereon of-a valve I3 normally1 under thestress of al spring'- |39 held compressed between the; valve I8"a`iid"aspider ftzsuitablyxed toand within the cap" or coupling' e; as shdwn inFig. 2. 'rol the upper' end of thefcapt is connected" a hippie 2"!wnieiif may have a threaded upper por; tion22`.

Thisidevice is designed for usewitha coin-` merci-al type ofgrase'container having' a cylindrical body 23"`provid`ed with a` bottom 24 andforjcontai-riing greasew On the *barrely or cyl` i-nder I maybesl'idably. associated a cover 26 having a resilient rim' 21 adaptediujjisnapl onto the upper rim 2a ofthe container 23 after the usualcover that copies with tl'i'eI container 23 has been' removed. Thedia'phiagin 5"ii`ts" closely within the container vetheilwhole area ofthe' grease" 25 and with the lackrig` 9111i sealing engagement with theinner wall of the` container 23 so' that as the atmosphereforces downthe diaphragnr 5 upon" the` grease'v 25 the grease will remain level.

To* the upperend of the nipplej @il isconnected a greaseJ gun 29 havinga barrel 33, a n'ozlzlev 3i', a stem 32, a tip 33, a piston 34 slidablein the barrel 3D, a piston rod 35 passing through the rear cap 36 on thebarrel 30, and a handle 31 on the exterior end of the piston rod 35.

Secured to a side portion of the nozzle chamber 3l isa stub or nipple 33preferably having a suitable check valve 39 therein and rotatablyconnected with this nipple is a coupling nut 4D adapted for readyconnection with and disconnection from the threaded portion 22 of thenipple 2|.

In use, when the piston 34 of the gun has reached rits inward positionat the end of the greasing operation, see Fig. 1, the nipple 38 isconnected to the nipple 2I by screwing the coupling nut 46 upon thethreaded end 22, and then, using the gun 29 as a handle, the cylinder 2is forced down in the 'cylinder I, whereupon the grease in the cylinder2 moves up by way of the valve I3, coupling 4, nipples ZI and 38 andinto the chamber of the nozzle 3|, to move the piston 34 rearwardlyuntil the gun is iilled with the grease. Then the gun is disconnected.The

check valve 39 automatically closes to prevent loss of grease from thenozzle 3|.

When the cylinder 2 is pulled upwardly, the valve I8 closes and thevatmospheric pressure acts down on the diaphragm to force grease 25 fromthe container 23 by way of the valve II-I2 into the barrel I, below andagainst the grease already in the cylinder 2. Because the diaphragm 5 isof comparatively much greater eiTective area than that of the cylinder Ithe downward thrust of the atmosphere upon the diaphragm 5 is muchgreater than the upward pull of the cylinder 2. Therefore, there is nonecessity for holding the cylinder I, as by the operators hand, when thecylinder 2 is pulled up.

While the invention has been described in an illustrative way asapplicable to the supplying or charging of grease to a grease gun, it isto be understood that the invention also applicable to grease cups,grease lines, and the like for the supplying, dispensing or charging ofgrease thereto.

While We have herein described and upon the drawings shown anillustrative embodiment of the invention, it is to be understood thatthe invention is not limited thereto but icornprehends otherconstructions, arrangements of p-arts, details, features and the likewithout departing from the spirit of the invention. l

Having thus disclosed the invention, We claim:

1. A grease gun charger comprising a pair of telescopically and mutuallyrec'iprocable hollow cylinders having valves at their outer ends forcontrolling the movement of grease in one direction through saidcylinders when said cylinders are mutually reciprocated, the inner endof the inner cylinder of said cylinders having an opening for the fullextent of the cross-sectional area of said inner cylinder, adiaphragmatic type of piston attached to the outer end of one of saidcylinders and being of a size to sealingly and slideably iit into acommercial type of grease container for forcing grease from saidcontainer into said cylinders under the force of atmospheric pressureacting on said piston in said container, and said piston having a portopposite the valve in the outer end of the cylinder to which said pistonis attached.

2. A grease gun charger comprising a pair of telescopically and mutuallyreciprocah-le hollow cylinders having valves at their outer ends orcontrolling the movement of grease in one direction through saidcylinders when said cylinders are mutually reciprocated, the inner endof the linner cylinder of said cylinders having an opening for the fullextent of the cross-sectional area o said inner cylinder, adiaphragmatic type of piston attached to the outer end of one of saidCylinders and being of a size to sealingly and slideably fit into acommercial type of grease container for forcing grease from said-container into said cylinders under the force of atmospheric pressureacting on said piston in said container, and said piston having a portopposite the valve in the outer end of the cylinder to which said pistonis attached, and said port having a valve seat for the seating thereonof said 'last mentioned valve.

3. A grease gun charger comprising a pair of telescopically and mutuallyreciprocable hollow cylinders having valves at their outer ends forcontrolling the movement of grease in one direction through saidcylinders when said cylinders are mutually reciprocated, the inner endof the inner cylinder of said cylinders having an opening for the fullextent of the cross-sectional area f of said inner cylinder, adiaphragrnatic type of piston attached to the outer end of one of saidcylinders and being of a size to sealingly and slidea-bly fit into acomercial type of grease container for forcing grease from said4container into said cylinders under the force of atmospheric pressureacting on said piston in said container, and salid piston having a portopposite the valve in the outer end of the cylinder to which said pistonis attached, and said piston having a rim provided with packing meansfor sealingly engaging with the wall of said container.

FRANK F. FUNK. ROBERT D. FUNK.

REFERENCES CITED rIhe following references are of record in the le ofthis patent:

UNITED STATES PATENTS Number Name Date 1,703,286 Zerk Feb. 26, 19291,750,151 Albertine Mar. 1l, 1930 1,807,421 Mahoney May 26, 19311,955,339 McConkey Apr. 17, 1934 2,001,568 Creveling May 14, 19352,045,297 Gray June 23, 1936 2,057,874 Barks et al Oct. 20, 19362,083,590 Barks June 15, 1937 2,393,217 Brewton Jan. 15, 1946

